4820-01-270-4921

Find complete technical information, availability, and procurement data for: 4820-01-270-4921
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for NSN 4820-01-270-4921 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-270-4921

Item Name Code

05487

Assigment Date

01/07/1988 (38 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

spring disk loading method, 3b all ends thread class, 250.0 fahrenheit single response maximum operating temp, right-hand all ends thread direction, poppet flow control device

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded internal boss all ends
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 12 all ends
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 1.312 inches all ends
Opening Pressure Setting: 2.0 pounds per square inch
Special Features: cracking pressure 2 psi
Material: rubber butadiene-acrylonitrile class nbr packing
Material: steel corrosion resisting body
Media For Which Designed: acetylene 2nd response
Media For Which Designed: air 1st response
Media For Which Designed: alcohol, ethyl 3rd response
Media For Which Designed: ammonia, gaseous 4th response
Media For Which Designed: carbon dioxide 5th response
Style Designator: straight thru
Thread Series Designator: un all ends

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
249T-16BB-2	Check Valve

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-01-270-4921?

The FSCG of the NSN 4820-01-270-4921 is 4820

Does the NSN 4820-01-270-4921 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-270-4921 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-01-270-4921 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-270-4921 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-01-270-4921 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Thu, Jan 7, 1988